My pond has been over run with I believe sago pond weed. I used my weed razor and cut it all out, took all day. I know to some extent it is beneficial to the pond ecosystem, but it is all the way around the pond and also seems to harbor the FA. I hate using chemicals. I already use Aquashade, but it still seems to grow everywhere. My thought was to try and kill some of it while it is cut off so I won't have to rake it out. What is the safest and best chemical to use? Cutrine plus only works on algae right?